GR-3053-CORE - Telcordia Information SuperStore

GR-3053-CORE
Issue 1 SGW Generic Requirements
February 2000 Contents
Contents Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface–1
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.1 Purpose and Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.2 Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.3 Target Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.4 Relationship to other Next Generation Network (NGN) Voice over
Packet (VoP) GRs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
1.5 Structure and Use of This Document . . . . . . . . . . . . . . . . . . 1–3
1.6 Requirements Terminology . . . . . . . . . . . . . . . . . . . . . . . . 1–4
1.7 Requirement Labeling Conventions . . . . . . . . . . . . . . . . . . . 1–5
1.7.1 Numbering of Requirement and Related Objects . . . . . . . 1–5
1.7.2 Requirement, Conditional Requirement, and Objective
Object Identification . . . . . . . . . . . . . . . . . . . . . . . 1–5
2. VoP Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.2 Functional Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.3 Interfaces and Protocols . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
2.4 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
3. SGW Functional Architecture and High-Level Requirements . . . . . . . . 3–1
3.1 SS7 Network Access Architecture . . . . . . . . . . . . . . . . . . . . 3–1
3.2 Signaling Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
3.2.1 SS7 Protocol Stack . . . . . . . . . . . . . . . . . . . . . . . . 3–2
3.2.2 Packet Network Protocol Stack . . . . . . . . . . . . . . . . . 3–3
3.2.2.1 Internet Protocol (IP) and User Datagram
Protocol (UDP) . . . . . . . . . . . . . . . . . . . . . 3–4
3.2.2.1.1 Internet Protocol (IP) . . . . . . . . . . . 3–4
3.2.2.1.2 User Datagram Protocol (UDP) Layer . . 3–4
3.2.2.2 Simple Control Transmission Protocol (SCTP) . . . 3–5
3.2.2.3 MTP3-User Adaptation Layer (M3UA) Protocol . . . 3–5
3.2.3 Signaling Gateway Interworking Function . . . . . . . . . . . 3–6
4. Interface - Functional Requirements . . . . . . . . . . . . . . . . . . . . . . 4–1
4.1 SS7 Network Protocol Interface - Functional Requirements . . . . . 4–1
4.1.1 Signaling Data Link Functions (MTP Level 1) . . . . . . . . . 4–1
4.1.2 Signaling Link Functions (MTP Level 2) . . . . . . . . . . . . 4–1
4.1.2.1 Signaling Unit Format, Delimitation, and
Alignment . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.1.2.2 Signaling Unit Acceptance and Error Detection . . 4–2
4.1.2.3 Error Correction . . . . . . . . . . . . . . . . . . . . 4–2
4.1.2.4 Signaling Link Initial Alignment . . . . . . . . . . . 4–2
4.1.2.5 Signaling Link Error Monitoring . . . . . . . . . . . 4–2
4.1.2.6 Level 2 Flow Control . . . . . . . . . . . . . . . . . . 4–3
4.1.2.7 Processor Outage . . . . . . . . . . . . . . . . . . . 4–3
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4.1.2.8 Provisional Values for Level 2 Timers . . . . . . . . 4–6
4.1.2.9 Link Performance . . . . . . . . . . . . . . . . . . . 4–7
4.1.2.10 False Link Congestion Detection . . . . . . . . . . . 4–8
4.1.3 Signaling Network Functions and Messages (MTP Level 3) . 4–8
4.1.3.1 Message Signaling Unit Information Handling . . . 4–8
4.1.3.1.1 Service Interface Between MTP Level 3
and the Upper Layer . . . . . . . . . . . . 4–8
4.1.3.1.2 Routing Label . . . . . . . . . . . . . . . . 4–9
4.1.3.1.3 Message Discrimination and
Distribution . . . . . . . . . . . . . . . . . 4–9
4.1.3.1.4 Message Routing . . . . . . . . . . . . . . 4–9
4.1.3.1.5 Loadsharing . . . . . . . . . . . . . . . 4–11
4.1.3.1.6 Message Sequencing . . . . . . . . . . . 4–11
4.1.3.2 Signaling Network Management . . . . . . . . . . 4–12
4.1.3.2.1 Signaling Link Activation . . . . . . . . 4–12
4.1.3.2.2 Signaling Link Changeover . . . . . . . 4–12
4.1.3.2.3 Signaling Link Changeback . . . . . . . 4–15
4.1.3.2.4 Forced Rerouting . . . . . . . . . . . . 4–16
4.1.3.2.5 Controlled Rerouting . . . . . . . . . . 4–17
4.1.3.2.6 MTP Restart . . . . . . . . . . . . . . . 4–18
4.1.3.2.7 Management Inhibiting . . . . . . . . . 4–26
4.1.3.2.8 Message Priorities and Congestion
Control . . . . . . . . . . . . . . . . . . 4–28
4.1.3.2.9 False Link Congestion . . . . . . . . . . 4–30
4.1.3.2.10 Signaling Route Management . . . . . . 4–31
4.1.3.2.11 MTP User Flow Control . . . . . . . . . 4–46
4.1.3.2.12 MTP Level 3 Timers . . . . . . . . . . . 4–46
4.1.4 Loss of Connectivity to CCA . . . . . . . . . . . . . . . . . . 4–49
4.2 Core Network/CCA Signaling Interfaces . . . . . . . . . . . . . . . 4–50
4.2.1 Core Network . . . . . . . . . . . . . . . . . . . . . . . . . . 4–51
4.2.1.1 Bearer Connection Control Interface . . . . . . . 4–52
4.2.2 Simple Control Transmission Protocol (SCTP) . . . . . . . 4–53
4.2.2.1 Functional View of SCTP . . . . . . . . . . . . . . 4–53
4.2.2.2 SCTP Protocol Requirements . . . . . . . . . . . . 4–55
4.2.3 MTP3-User Adaptation (M3UA) Layer . . . . . . . . . . . . 4–58
4.2.3.1 M3UA Signaling Message Handling Functions . . 4–59
4.2.3.2 M3UA Routing Data . . . . . . . . . . . . . . . . . 4–59
4.2.3.2.1 Overview of M3UA Routing Data at
SGWs . . . . . . . . . . . . . . . . . . . 4–59
4.2.3.2.2 Requirements for M3UA Routing Data . 4–60
4.2.3.2.3 Requirements for M3UA Routing
Procedures . . . . . . . . . . . . . . . . 4–61
4.2.3.3 SCTP Stream Mapping . . . . . . . . . . . . . . . . 4–61
4.2.3.4 Message Handling During Overload . . . . . . . . 4–62
4.2.3.5 M3UA Network Management Functions . . . . . . 4–63
4.2.3.5.1 Management Inhibiting/Uninhibiting . . 4–63
4.2.3.5.2 Signaling Traffic Flow Control . . . . . 4–64

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Issue 1 SGW Generic Requirements
February 2000 Contents
4.2.3.5.3 SCTP Association Initialization and
Termination . . . . . . . . . . . . . . . 4–64
4.2.3.5.4 Destination Unavailable Procedure . . 4–64
4.2.3.5.5 Destination Available Procedure . . . . 4–65
4.2.3.5.6 Destination State Audit Procedure . . . 4–65
4.2.3.5.7 SS7 Network Congestion State
Procedure . . . . . . . . . . . . . . . . . 4–66
4.2.3.5.8 Destination User Part Unavailable
Procedure . . . . . . . . . . . . . . . . . 4–66
4.2.3.5.9 AS State Mapping Procedures . . . . . 4–66
4.3 Interworking Function . . . . . . . . . . . . . . . . . . . . . . . . . 4–67
4.3.1 Transfer of MTP3 Primitives . . . . . . . . . . . . . . . . . . 4–67
4.3.2 Notification of Loss of Connectivity to SS7 Network . . . . 4–68
4.3.3 Notification of Loss of Connectivity to CCA . . . . . . . . . 4–69
4.3.4 Internal Flow Control Function between MTP3 and M3UA 4–70
5. Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.1 Management Framework . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.1.1 TMN Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
5.1.2 Functional Management Strategy . . . . . . . . . . . . . . . . 5–3
5.1.3 Management Interfaces . . . . . . . . . . . . . . . . . . . . . . 5–5
5.1.4 Overview and Scope of SGW Management . . . . . . . . . . . 5–6
5.2 Configuration Management . . . . . . . . . . . . . . . . . . . . . . . . 5–6
5.2.1 General Configuration Management (Common) . . . . . . . . 5–7
5.2.1.1 Loading of Software Generic Programs . . . . . . . 5–7
5.2.1.2 Management of SGW Configuration Information . . 5–8
5.2.1.3 Configuration Management of Physical Resources . 5–8
5.2.1.4 Configuration Database Backup and Recovery . . . 5–9
5.2.1.5 VoP EMS Notification of Local CM Activity and
Resource State Changes . . . . . . . . . . . . . . . . 5–9
5.2.2 SGW Provisioning . . . . . . . . . . . . . . . . . . . . . . . . 5–10
5.2.2.1 Self Identification . . . . . . . . . . . . . . . . . . 5–11
5.2.2.2 SS7 Interfaces and Resources . . . . . . . . . . . . 5–11
5.2.2.2.1 SS7 Self-Identity Signaling Point Code . 5–12
5.2.2.2.2 SS7 Destinations . . . . . . . . . . . . . 5–12
5.2.2.2.3 SS7 Link Interface Equipment Ports . . 5–13
5.2.2.2.4 SS7 Link Sets . . . . . . . . . . . . . . . 5–13
5.2.2.2.5 SS7 Signaling Routes . . . . . . . . . . 5–14
5.2.2.2.6 SS7 Links . . . . . . . . . . . . . . . . . 5–15
5.2.2.2.7 SS7 MTP Level 2 Timer Profiles . . . . 5–15
5.2.2.2.8 SS7 MTP Link Transmit Congestion
Threshold Profiles . . . . . . . . . . . . 5–16
5.2.2.2.9 SS7 MTP Level 3 Timer Profile . . . . . 5–17
5.2.2.2.10 MTP3 Control Indicators . . . . . . . . 5–19
5.2.2.2.11 SS7 Provisioning Operations . . . . . . 5–20
5.2.2.3 CCA Interface and Resources . . . . . . . . . . . . 5–22
5.2.2.3.1 CCA Identification . . . . . . . . . . . . 5–22
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5.2.2.3.2 M3UA Layer Resources . . . . . . . . . 5–23
5.2.2.3.3 SCTP Layer Resources . . . . . . . . . 5–25
5.2.2.3.4 Provisioning Operations for CCA
Interface Resources . . . . . . . . . . . 5–26
5.2.2.4 Core Network Interfaces . . . . . . . . . . . . . . 5–26
5.2.3 Status Management . . . . . . . . . . . . . . . . . . . . . . . 5–27
5.2.3.1 Status Monitoring . . . . . . . . . . . . . . . . . . 5–28
5.2.3.1.1 General State Variables . . . . . . . . . 5–28
5.2.3.1.2 Overview of SGW Monitored
Resources and States . . . . . . . . . . 5–29
5.2.3.1.3 SGW SS7 Signaling Point States . . . . 5–31
5.2.3.1.4 SS7 Link Equipment Port States . . . . 5–33
5.2.3.1.5 SS7 Link States . . . . . . . . . . . . . . 5–34
5.2.3.1.6 SS7 Link Set States . . . . . . . . . . . . 5–39
5.2.3.1.7 SS7 Destination/Route-Set States . . . 5–40
5.2.3.1.8 SS7 Signaling Route States . . . . . . . 5–41
5.2.3.1.9 CCA Interface Status . . . . . . . . . . 5–43
5.2.3.1.10 Remote M3UA Application Server
States for CCA . . . . . . . . . . . . . . 5–43
5.2.3.1.11 Remote M3UA Application Server
Process States for CCA . . . . . . . . . 5–44
5.2.3.1.12 SGW Local M3UA ASP States . . . . . . 5–44
5.2.3.1.13 SCTP Association States . . . . . . . . 5–45
5.2.3.1.14 SCTP Destination Transport Address
States . . . . . . . . . . . . . . . . . . . 5–46
5.2.3.1.15 Core Network Interface Resources . . 5–46
5.2.3.2 Status Management and Control . . . . . . . . . . 5–47
5.2.3.2.1 Status Retrieval - General . . . . . . . . 5–47
5.2.3.2.2 Autonomous Notification of State
Changes . . . . . . . . . . . . . . . . . . 5–47
5.2.3.2.3 SGW Status Change Log . . . . . . . . . 5–49
5.2.3.2.4 Status Management Actions - General . 5–49
5.2.3.2.5 Status Management Actions for SS7
Interfaces . . . . . . . . . . . . . . . . . 5–50
5.2.3.2.6 Status Management Actions for the CCA
Interface . . . . . . . . . . . . . . . . . 5–51
5.2.3.2.7 Status Management Actions for Core
Network Interfaces . . . . . . . . . . . 5–52
5.3 Fault Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–52
5.3.1 Alarm/Event Surveillance . . . . . . . . . . . . . . . . . . . 5–53
5.3.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . 5–53
5.3.1.1.1 Alarm Surveillance Functional
Requirements . . . . . . . . . . . . . . . 5–53
5.3.1.1.2 Alarm/Event Notification Contents
(Common) . . . . . . . . . . . . . . . . 5–54
5.3.1.1.3 Filtering and Throttling . . . . . . . . . 5–55
5.3.1.1.4 Notification Retention . . . . . . . . . . 5–55

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Issue 1 SGW Generic Requirements
February 2000 Contents
5.3.1.1.5 Overview of SGW Resource-and-Event-
Specific Alarm Requirements . . . . . . 5–56
5.3.1.2 For SS7 Interfaces . . . . . . . . . . . . . . . . . . 5–56
5.3.1.2.1 SGW SS7 Signaling Isolation from
Serving STP Pair . . . . . . . . . . . . . 5–58
5.3.1.2.2 SGW SS7 Signaling Isolation Recovery 5–58
5.3.1.2.3 SGW SS7 Isolation From Adjacent STP 5–58
5.3.1.2.4 SGW SS7 Isolation Recovery from
Adjacent STP . . . . . . . . . . . . . . . 5–58
5.3.1.2.5 SS7 Destination Inaccessible . . . . . . 5–59
5.3.1.2.6 SS7 Destination Accessible . . . . . . . 5–59
5.3.1.2.7 SS7 Route Set Remote Congestion . . . 5–59
5.3.1.2.8 SS7 Route Set Remote Congestion
Abatement . . . . . . . . . . . . . . . . 5–60
5.3.1.2.9 SS7 Remote User Part Unavailable . . . 5–60
5.3.1.2.10 SS7 Link Set Outage . . . . . . . . . . . 5–61
5.3.1.2.11 SS7 Link Set Available . . . . . . . . . . 5–62
5.3.1.2.12 SS7 Link Unavailable (Link Outage) . . 5–62
5.3.1.2.13 SS7 Link Available . . . . . . . . . . . . 5–63
5.3.1.2.14 SS7 Link Failure . . . . . . . . . . . . . 5–64
5.3.1.2.15 SS7 Link Restoration/Activation . . . . 5–68
5.3.1.2.16 SS7 Link Alignment Failure . . . . . . . 5–68
5.3.1.2.17 Sustained SS7 Link Failure
(Failed Link Craft Referral) . . . . . . . 5–69
5.3.1.2.18 SS7 Link Inhibit . . . . . . . . . . . . . 5–71
5.3.1.2.19 SS7 Link Inhibit Denied . . . . . . . . . 5–71
5.3.1.2.20 SS7 Link Uninhibit . . . . . . . . . . . . 5–72
5.3.1.2.21 SS7 Link Blocked - Remote
Processor Outage . . . . . . . . . . . . 5–73
5.3.1.2.22 SS7 Link Unblocked - End of Remote
Processor Outage . . . . . . . . . . . . 5–74
5.3.1.2.23 SS7 Link Blocked - Local Processor
Outage . . . . . . . . . . . . . . . . . . . 5–74
5.3.1.2.24 SS7 Link Unblocked - End of Local
Processor Outage . . . . . . . . . . . . 5–75
5.3.1.2.25 SS7 Link Deactivated/Removed from
Service . . . . . . . . . . . . . . . . . . 5–76
5.3.1.2.26 SS7 Link Activation Initiated . . . . . . 5–76
5.3.1.2.27 SS7 Local MTP3 Unavailable . . . . . . 5–77
5.3.1.2.28 SS7 Link Transmit Congestion
Onset/Increase . . . . . . . . . . . . . . 5–77
5.3.1.2.29 SS7 Link Transmit Congestion
Abatement . . . . . . . . . . . . . . . . 5–78
5.3.1.2.30 Commencement of SS7 Link
Transmit Buffer Overflow . . . . . . . . 5–79
5.3.1.2.31 Termination of SS7 Link Transmit
Buffer Overflow . . . . . . . . . . . . . 5–79
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5.3.1.2.32 SS7 MTP Restart Procedures Initiated . 5–79
5.3.1.2.33 SS7 MTP Restart Status . . . . . . . . . 5–80
5.3.1.2.34 MTP Restart Procedures Terminated . 5–80
5.3.1.2.35 SGW Signaling Message Handling
(SMH) Congestion Onset/Increase . . . 5–80
5.3.1.2.36 SGW Local Signaling Message Handling
Congestion Abatement/Recovery . . . 5–81
5.3.1.2.37 Incoming SS7 MTP Message
Discrimination Failure . . . . . . . . . . 5–81
5.3.1.2.38 Outbound SS7 Message Routing
Failure . . . . . . . . . . . . . . . . . . . 5–83
5.3.1.3 For the CCA Interface (M3UA and SCTP) . . . . . 5–84
5.3.1.3.1 CCA-SGW Signaling Isolation . . . . . . 5–84
5.3.1.3.2 CCA-SGW Signaling Isolation Recovery 5–86
5.3.1.3.3 M3UA Message Error . . . . . . . . . . 5–86
5.3.1.3.4 CCA-SGW SCTP Association Shutdown 5–87
5.3.1.3.5 CCA-SGW SCTP Association
Established . . . . . . . . . . . . . . . . 5–88
5.3.1.3.6 CCA-SGW SCTP Association
Communication Lost . . . . . . . . . . 5–88
5.3.1.3.7 CCA-SGW SCTP Association
Communication Up . . . . . . . . . . . 5–89
5.3.1.3.8 CCA-SGW SCTP Network Status
Change . . . . . . . . . . . . . . . . . . 5–89
5.3.1.3.9 CCA-SGW Transport Network
Congestion . . . . . . . . . . . . . . . . 5–90
5.3.1.4 For Core Network Interfaces . . . . . . . . . . . . 5–90
5.3.2 Fault Localization . . . . . . . . . . . . . . . . . . . . . . . . 5–90
5.3.2.1 General . . . . . . . . . . . . . . . . . . . . . . . . 5–91
5.3.2.2 For SS7 Interfaces . . . . . . . . . . . . . . . . . . 5–91
5.3.2.2.1 SS7 Link Terminal Diagnostic
Procedures . . . . . . . . . . . . . . . . 5–91
5.3.2.3 For the CCA Interface . . . . . . . . . . . . . . . . 5–92
5.3.3 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–92
5.3.3.1 General . . . . . . . . . . . . . . . . . . . . . . . . 5–92
5.3.3.2 For SS7 Interfaces . . . . . . . . . . . . . . . . . . 5–92
5.3.3.3 For the CCA Interface (M3UA and SCTP) . . . . . 5–93
5.3.3.4 For Core Network Interfaces . . . . . . . . . . . . 5–93
5.3.3.4.1 IP Access Router Traceroute
Capabilities . . . . . . . . . . . . . . . . 5–93
5.3.3.4.2 Ethernet TDR Tests . . . . . . . . . . . 5–93
5.4 Performance Management . . . . . . . . . . . . . . . . . . . . . . . 5–94
5.4.1 General Monitoring Requirements (Common) . . . . . . . . 5–94
5.4.1.1 Counters and Monitoring Intervals . . . . . . . . . 5–94
5.4.1.2 Generation of Threshold Crossing Alerts (TCAs) . 5–97
5.4.2 SGW Traffic and Performance Monitoring . . . . . . . . . . 5–97
5.4.2.1 SGW System Totals . . . . . . . . . . . . . . . . . 5–98

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February 2000 Contents
5.4.2.2 SS7 Interface Measurements . . . . . . . . . . . . 5–99
5.4.2.2.1 SS7 Link Measurements . . . . . . . . . 5–100
5.4.2.2.2 SS7 Link Marginal Performance
Reports and TCAs . . . . . . . . . . . . 5–101
5.4.2.2.3 SS7 Link Set Measurements . . . . . . . 5–103
5.4.2.2.4 SS7 Destination/Route-Set
Measurements . . . . . . . . . . . . . . 5–103
5.4.2.2.5 SS7 Destination/Route-Set Exception
Measurements . . . . . . . . . . . . . . 5–104
5.4.2.2.6 MTP3 and Interworking
Measurements . . . . . . . . . . . . . . 5–104
5.4.2.3 CCA Interface Measurements . . . . . . . . . . . . 5–105
5.4.2.3.1 M3UA Layer Measurements . . . . . . . 5–105
5.4.2.3.2 SCTP Layer Measurements . . . . . . . 5–106
5.4.2.3.3 SCTP Exception Reports and TCAs . . 5–107
5.4.2.4 Core Network Interface Measurements . . . . . . 5–108
5.4.2.4.1 UDP Layer Protocol Monitoring . . . . 5–108
5.4.2.4.2 IP Layer Protocol and Traffic
Monitoring . . . . . . . . . . . . . . . . 5–109
5.4.2.4.3 Physical Layer Protocol Monitoring
(Ethernet) . . . . . . . . . . . . . . . . . 5–110
5.4.2.5 Measurements for Other SGW Components or
Modules . . . . . . . . . . . . . . . . . . . . . . . . 5–112
5.4.2.5.1 SGW Processors . . . . . . . . . . . . . 5–113
5.4.2.5.2 Other SGW Equipment Units . . . . . . 5–113
6. Performance, Capacity, and Reliability Requirements . . . . . . . . . . . . 6–1
7. Spatial and Environmental Requirements . . . . . . . . . . . . . . . . . . . 7–1
7.1 Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1
7.2 Electromagnetic and Electrical Environment . . . . . . . . . . . . . . 7–1
Appendix A: Message Flow Examples . . . . . . . . . . . . . . . . . . . . . . . A–1
A.1 Transfer of Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–1
A.1.1 SS7 SSP to CCA . . . . . . . . . . . . . . . . . . . . . . . . . . A–1
A.1.2 CCA to SS7 SSP . . . . . . . . . . . . . . . . . . . . . . . . . . A–2
A.2 SS7 Network Management Interworking Examples . . . . . . . . . . A–4
A.2.1 SS7 Destination Unavailability . . . . . . . . . . . . . . . . . . A–4
A.2.2 SS7 Destination Availability . . . . . . . . . . . . . . . . . . . A–5
A.2.3 SS7 Network Congestion . . . . . . . . . . . . . . . . . . . . . A–5
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . References–1
Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Acronyms–1
Requirement-Object Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . ROI–1
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List of Figures Figures
Figure 2-1. High-Level VoP Network Architecture . . . . . . . . . . . . . . 2–1
Figure 2-2. Overview of VoP Physical Interfaces . . . . . . . . . . . . . . . 2–4
Figure 3-1. SS7 Network Access Architecture . . . . . . . . . . . . . . . . . 3–1
Figure 3-2. Protocol Stacks at SGW . . . . . . . . . . . . . . . . . . . . . . 3–2
Figure 4-1. Relative Positioning of Congestion Thresholds . . . . . . . . 4–30
Figure 4-2. Bearer and Signaling Transport Stack . . . . . . . . . . . . . . 4–50
Figure 5-1. TMN Logical Layers . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
Figure 5-2. Functional Management Architecture Example . . . . . . . . . 5–4
Figure A-1. Successful Message Transfer from an SSP to a CCA . . . . . . A–1
Figure A-2. Successful Message Transfer from a CCA to an SSP . . . . . . A–3
Figure A-3. SS7 Destination Unavailability . . . . . . . . . . . . . . . . . . . A–4
Figure A-4. SS7 Destination Availability . . . . . . . . . . . . . . . . . . . . A–5
Figure A-5. SS7 Network Congestion . . . . . . . . . . . . . . . . . . . . . . A–6
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February 2000 List of Tables
List of Tables Tables
Table 4-1. Provisional Values for Level 2 Timers . . . . . . . . . . . . . . . 4–6
Table 4-2. Provisional Values for Signaling Link Test Timers . . . . . . . 4–46
Table 4-3. Provisional Values for MTP Level 3 Timers . . . . . . . . . . . 4–47
Table 5-1. Mapping of SS7 Signaling Point Status to X.731
Operational State . . . . . . . . . . . . . . . . . . . . . . . . . 5–32
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